Assessment of Aerodynamic Derivatives of the Ideal Flat Plate Based on the Moving Grid Method
Assessment of Aerodynamic Derivatives of the Ideal Flat Plate Based on the Moving Grid Method
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发表时间：
2002
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通讯作者：
Z. Zhi
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作者：
Z. Zhi
本文对理想平板振荡流场进行了数值模拟，以计算其气动导数。采用投影2方法对含时不可压Navier-Stokes方程进行解耦。对中间速度的动量方程采用二阶半隐式格式进行时空离散，对压力的泊松方程采用多重网格方法进行有效求解。用动网格法计算了垂荡或俯仰振动平板的非定常气动力，并计算了平板的运动。气动导数的提取采用最小二乘法。计算的气动导数与Theodorsen的理论解符合较好。
Numerical simulation of the flow field around the oscillating ideal flat plate is presented to assess the aerodynamic derivatives. The time dependent incompressible Navier Stokes equations are decoupled using Projection 2 method. The second order semi implicit scheme is employed in temporal and spatial discretization for the momentum equations of intermediate velocities, while the Possions equation for pressure is solved efficiently by using the multigrids method. Unsteady aerodynamic force on the heaving or pitching oscillated flat plate are computed and the motion of the plate is accounted by the moving grid method. The aerodynamic derivatives are extracted with the Least Square Method. The computed aerodynamic derivatives are in better agreement with Theodorsens theoretic solutions.